I'm not a hydro guy, but looks like it could be either rootbound or consistent oversaturation. (overwatering or overly humid...?)

Someone with hydro experience should be along soon with a more accurate and reliable diagnosis though.

Nice job with filling-out the form. :thumbsup:
But there is a hydro-specific troubleshooting form available. It's just below the soil form in the same thread. Might be needing some of the pertinant info from the hydro form for a proper diagnosis. <doh>
Rusty Trichome Reviewed by Rusty Trichome on . my leaves look sick. pics any help ? Subject: curling under sick baby please help my baby is curling under it looks sick its been like this ever since i started giving it full strenght nutrients i i backed up on the nutrients about three days ago and its still not getting better its getting worse its still growing rapidly and looks nice and green but leaves are curling the first three to four leaves it produced got litlle orange dots on them had them since befour the vegetative stage but the rest of the plant dont have the dots Rating: 5